C4A3S-structure

[Diffract]

Looking for a reliable structure reference of calcium aluminum oxide sulfate,
4CaO-3Al2O3-S03 or C4A3S (PDF #33-256). C4A3S is the 'precursor' for
ettringite formation and is added to Portland cement to produce shrink-
compensated, fast-setting concrete. 

Thanks

L. Keller
CAMET Research, Inc.
Goleta, CA